html, body { height: 100%; margin: 0; }
body {
  background: var(--surface);
  background-image: url('bg-texture.png');
  background-size: cover;
  background-position: center;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  font-family: var(--font-mono);
}

.skill-page {
  flex: 1;
  padding: 24px 32px 48px;
  display: flex;
  flex-direction: column;
}

.skill-layout {
  display: flex;
  gap: 24px;
  align-items: flex-start;
  flex: 1;
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
}

.skill-box {
  position: relative;
  border: 1px dashed var(--brand);
  background: var(--bg-base);
  display: flex;
  flex-direction: column;
  flex: 1;
  min-width: 0;
  max-width: 968px;
}

.skill-sidebar {
  width: 260px;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding-top: 4px;
}

.skill-related-list {
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.skill-related-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 14px 16px;
  border: 1px solid var(--bg-chip);
  background: var(--bg-elevated);
  text-decoration: none;
  transition: border-color 100ms steps(2), background 100ms steps(2);
  margin-bottom: 8px;
}
.skill-related-card:last-child { margin-bottom: 0; }
.skill-related-card:hover { border-color: var(--slate-600); background: var(--bg-base); }

.skill-related-title { font: 700 12px/1.35 var(--font-mono); color: var(--fg-primary); }
.skill-related-desc { font: 400 11px/1.5 var(--font-mono); color: var(--fg-muted); }
.skill-related-meta { display: flex; flex-wrap: wrap; gap: 4px; margin-top: 2px; }
.skill-related-empty { font: 400 11px/1.5 var(--font-mono); color: var(--fg-muted); }
.skill-box .cm { position: absolute; width: 8px; height: 8px; border: 2px solid var(--brand); pointer-events: none; }
.skill-box .cm.tl { top:-1px; left:-1px; border-right:0; border-bottom:0; }
.skill-box .cm.tr { top:-1px; right:-1px; border-left:0; border-bottom:0; }
.skill-box .cm.bl { bottom:-1px; left:-1px; border-right:0; border-top:0; }
.skill-box .cm.br { bottom:-1px; right:-1px; border-left:0; border-top:0; }

.skill-titlebar {
  height: 28px; min-height: 28px;
  border-bottom: 1px solid var(--brand);
  display: flex; align-items: center; gap: 16px;
  padding: 0 16px; flex-shrink: 0;
}
.skill-titlebar-label { font: 400 12px/1 var(--font-mono); color: var(--slate-500); flex: 1; }
.skill-back {
  font: 400 11px/1 var(--font-mono); color: var(--fg-muted);
  text-decoration: none; display: flex; align-items: center; gap: 4px;
  transition: color 60ms steps(1);
}
.skill-back:hover { color: var(--brand); }
.skill-back-icon {
  display: inline-block; width: 12px; height: 12px; background: currentColor;
  -webkit-mask-image: url('icons/chevron-left.svg'); mask-image: url('icons/chevron-left.svg');
  -webkit-mask-size: contain; mask-size: contain;
  -webkit-mask-repeat: no-repeat; mask-repeat: no-repeat;
  -webkit-mask-position: center; mask-position: center;
}

.skill-body { display: flex; flex: 1; min-height: 0; }

.skill-left {
  flex: 1; min-width: 0;
  padding: 28px 32px 40px;
  display: flex; flex-direction: column; gap: 24px;
  border-right: 1px dashed rgba(244,128,93,0.2);
}

.skill-right {
  width: 280px; flex-shrink: 0;
  padding: 28px 24px 40px;
  display: flex; flex-direction: column; gap: 20px;
}

.skill-path { font: 400 10px/1 var(--font-mono); color: var(--fg-muted); letter-spacing: 0.04em; margin-bottom: 6px; }
.skill-path span { color: var(--brand); }
.skill-path a { color: var(--brand); text-decoration: none; }
.skill-path a:hover { color: var(--brand); border-bottom: 1px dashed var(--brand); }
.skill-title { font: 700 22px/1.2 var(--font-mono); color: var(--fg-primary); }
.skill-desc { font: 400 13px/1.65 var(--font-mono); color: var(--fg-secondary); }

.skill-tags { display: flex; flex-wrap: wrap; gap: 4px; }
.tag {
  font: 400 10px/1 var(--font-mono); color: var(--fg-secondary);
  border: 1px solid var(--bg-chip); background: var(--bg-chip-alt);
  padding: 3px 7px; letter-spacing: 0.02em;
}
.tag.orange { color: var(--brand); border-color: var(--orange-ash); background: rgba(57,41,29,0.6); }
.tag.orange:hover { background: rgba(57,41,29,1); }
.tag.green  { color: var(--success); border-color: rgba(52,211,153,0.25); background: rgba(4,120,87,0.15); }
.tag.green:hover { border-color: rgba(52,211,153,1); color: var(--success); background: rgba(4,120,87,0.25); }
.tag.yellow { color: var(--hint); border-color: rgba(253,224,71,0.2); background: rgba(253,224,71,0.07); }
.tag.yellow:hover { border-color: rgba(253,224,71,1); color: var(--hint); background: rgba(253,224,71,0.15); }
.tag.red { color: rgba(233,0,0,0.6); border-color: rgba(174,1,15,0.2); background: rgba(174,1,15,0.07); }
.tag.red:hover { border-color: rgba(174,1,15,1); color: rgba(174,1,15,1); background: rgba(174,1,15,0.15); }

.section-label {
  font: 700 10px/1 var(--font-mono); color: var(--fg-muted);
  letter-spacing: 0.1em; text-transform: uppercase; margin-bottom: 8px;
}

.skill-content { font: 400 13px/1.7 var(--font-mono); color: var(--fg-secondary); }
.skill-content h2 { font: 700 14px/1.4 var(--font-mono); color: var(--brand); margin: 20px 0 8px; letter-spacing: 0.04em; }
.skill-content h2:first-child { margin-top: 0; }
.skill-content h3 { font: 700 12px/1.4 var(--font-mono); color: var(--hint); margin: 16px 0 6px; }
.skill-content p { margin: 0 0 10px; }
.skill-content p:last-child { margin: 0; }
.skill-content ul, .skill-content ol { margin: 0 0 10px; padding-left: 20px; }
.skill-content li { margin-bottom: 4px; }
.skill-content code { font: 400 12px/1 var(--font-mono); color: var(--success); background: rgba(52,211,153,0.08); padding: 1px 5px; }
.skill-content pre { background: var(--bg-elevated); border: 1px dashed rgba(244,128,93,0.2); padding: 12px 16px; overflow-x: auto; margin: 0 0 12px; }
.skill-content pre code { background: none; padding: 0; }
.skill-content strong { color: var(--fg-primary); font-weight: 700; }

.skill-content table {
  width: 100%; border-collapse: collapse;
  font: 400 12px/1.5 var(--font-mono); color: var(--fg-secondary);
  margin: 0 0 16px; display: block; overflow-x: auto;
}
.skill-content thead { border-bottom: 1px solid rgba(244,128,93,0.3); }
.skill-content th {
  text-align: left; padding: 8px 12px;
  font-weight: 700; color: var(--fg-primary);
  border: 1px solid rgba(255,255,255,0.06);
  white-space: nowrap;
}
.skill-content td {
  text-align: left; padding: 7px 12px;
  border: 1px solid rgba(255,255,255,0.06);
  vertical-align: top;
}

.video-embed {
  position: relative;
  width: 100%;
  padding-bottom: 56.25%; /* 16:9 */
  border: 1px dashed rgba(244,128,93,0.3);
  background: var(--bg-elevated);
}
.video-embed iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: none;
}

.skill-instructions {
  border: 1px dashed rgba(244,128,93,0.25); padding: 16px;
  display: flex; flex-direction: column; gap: 12px;
}
.skill-step { display: flex; gap: 10px; align-items: flex-start; }
.skill-step-num { font: 700 10px/1 var(--font-mono); color: var(--brand); flex-shrink: 0; padding-top: 1px; letter-spacing: 0.04em; }
.skill-step-text { font: 400 11px/1.55 var(--font-mono); color: var(--fg-secondary); }
.skill-step-text strong { color: var(--fg-primary); font-weight: 700; }

.skill-action-btns { display: flex; flex-direction: column; gap: 8px; }

.skill-download-btn {
  display: flex; align-items: center; justify-content: center; gap: 8px;
  background: var(--brand); color: var(--bg-base); border: none;
  padding: 9px 16px; font: 400 12px/1 var(--font-mono);
  cursor: pointer; text-decoration: none; transition: background 60ms steps(1); width: 100%;
}
.skill-download-btn:hover { background: var(--orange-tint); }

.skill-share-btn {
  display: flex; align-items: center; justify-content: center; gap: 8px;
  background: none; color: var(--fg-secondary);
  border: 1px dashed rgba(244,128,93,0.4);
  padding: 8px 16px; font: 400 12px/1 var(--font-mono);
  cursor: pointer; transition: all 60ms steps(1); width: 100%;
}
.skill-share-btn:hover { border-color: var(--brand); color: var(--brand); }
.skill-share-btn.copied { color: var(--success); border-color: rgba(52,211,153,0.4); }

a.tag { text-decoration: none; }
a.tag:hover { color: var(--brand); border-color: var(--orange-ash); background: rgba(57,41,29,0.4); }

.skill-meta-author-row {
  display: flex; align-items: flex-start; justify-content: space-between; gap: 12px;
  border-bottom: 1px dashed rgba(244,128,93,0.12); padding-bottom: 12px;
}
.skill-meta-author-info { display: flex; flex-direction: column; gap: 5px; }
.skill-meta-row-label { font: 700 10px/1 var(--font-mono); color: var(--fg-muted); letter-spacing: 0.1em; text-transform: uppercase; }
.skill-meta-author-name { font: 700 13px/1.2 var(--font-mono); color: var(--fg-primary); }
.skill-meta-author-avatar {
  display: block; width: 64px; height: 64px; object-fit: cover;
  border: 1px dashed var(--brand); background: var(--bg-base); flex-shrink: 0;
  padding: 3px;
}

.skill-meta-link {
  color: var(--brand); text-decoration: none;
  font: 400 11px/1 var(--font-mono);
  transition: color 60ms steps(1);
}
.skill-meta-link:hover { color: var(--orange-tint); border-bottom: 1px dashed var(--brand); }

.skill-meta-block { display: flex; flex-direction: column; gap: 8px; padding-top: 4px; }
.skill-meta-row {
  display: flex; justify-content: space-between; align-items: flex-start;
  font: 400 11px/1 var(--font-mono); color: var(--fg-muted);
  border-bottom: 1px dashed rgba(244,128,93,0.12); padding-bottom: 7px; gap: 12px;
}
.skill-meta-row:last-child { border-bottom: none; padding-bottom: 0; }
.skill-meta-row span:first-child { flex-shrink: 0; }
.skill-meta-row span:last-child { color: var(--fg-secondary); text-align: right; }


::-webkit-scrollbar { width: 4px; height: 4px; }
::-webkit-scrollbar-track { background: var(--bg-base); }
::-webkit-scrollbar-thumb { background: var(--orange-ash); }
::-webkit-scrollbar-thumb:hover { background: var(--orange-500); }

@media (max-width: 1100px) {
  .skill-sidebar { width: 220px; }
}
@media (max-width: 900px) {
  .skill-page { padding: 16px; }
  .skill-layout { flex-direction: column; }
  .skill-sidebar { width: 100%; }
  .skill-related-list { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
  .skill-related-card { margin-bottom: 0; }
  .skill-body { flex-direction: column; }
  .skill-right { width: 100%; border-top: 1px dashed rgba(244,128,93,0.2); padding: 24px; }
  .skill-left { border-right: none; }
}
@media (max-width: 640px) {
  .skill-page { padding: 12px; }
  .skill-related-list { grid-template-columns: 1fr; }
  .skill-content table { display: none; }
}